Apparatus for burning solid fuel



UNITE snares ANDREW new, or PITTSBURGH, PENNSYLVANIA.

APPARATUS FOR BURNING SOLID FUEL.

Specification of Letters Patent. Patented Jan, 13, 1920,

Application filed February 24-, 1919. Serial No. 278,968.

- To all whom it may concern: 1

Be it known that I, ANDREW LANZ, a citizen of the United States, a resident of Pittsburgh, inthe county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Burning Solid Fuel; and do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to apparatus for burning solid fuel.

The object of my invention is to provlde a simple and eflicient form of solid fuel burning apparatus in which the fuel in the form of slack or fine coal is delivered uniformly and evenly to the grate and distributed in such a way as to prevent the accumulation of the fuel in piles at any one point, so that a very hot fire is obtained with a minimum consumption of fuel.

To these ends my invention comprises the novel features hereinafter set forth and claimed.

In the accompanying drawing, Figure 1 is a sectional elevation on the line 11 Fig. 2, of a portion of a furnace showing my invention applied thereto, and Fig. 2 is a sectional plan view.

' In the drawing the numeral 2 designates the furnace which may be of any suitable construction, and used for any purpose, said furnace having the fire-chamber 3 and the ash-pit 4.

The grate 5 is circular in form and is adapted to rotate on the rollers 6.

The outer rim of the grate 5 is provided on its under face with the rack 9, which is engaged by the bevel-pinion 10 on the shaft 11, which may be driven from any suitable engine or motor.

The furnace structure comprises the thick masonry portion 12 with the cylindrical passage 13 formed therein, lined with the metal casing 14: provided with the bottomplate 15.

A shaft 16 is journaled in suitable bearings 17, and said shaft carries the spiral conveyer 18. At the lower end of the shaft 18 is the bevel-gear 19, which is engaged by the bevel-pinion 20 on the shaft 21, which may be driven from any suitable source of power.

The chamber 13 is supplied with coal from the supply-hopper 22, which communicates with said chamber at its inner end, said hopper extending out to the point beyond the furnace wall for charging purposes. The deflector 23 is provided for delivering the fuel onto the grate 5, and said doflector may form part of the masonry structure 12. The deflector is arranged to pro- ]ect over an arc of the circular grate, and is elevated above it to permit free movement of the grate and its fire bed beneath it. The deflector has a downwardly inclined face which terminates at its lower end, (its discharge end) at a point above the top surface of the fire bed for the purpose more fully hereinafter set forth,-

At the upper end of the casing 14;. on the outside thereof, is the semi-circular collar 24 which acts to distribute the fuel de livered from the casing onto the deflector-23. V

When in operation the fuel in the form of slack or powdered coal .is discharged into the hopper 22 and passes thence into the passage 13. When power is applied to rotate the shaft 16 the spiral conveyer l8 lifts the coal in the passage and discharges it from the upper end thereof over the semicircular collar 24, onto the. deflector 23.

The collar 24 acts to distribute the coal over the inclined face of thedeflector so that it will pass by gravity down said deflector onto and preheating of the fuel with the hot' gases of the fire chamber, combustion taking place with the fine dust particles of the fuel before reaching the grate, and resulting in a constant flame in the fire chamber,

and elimination of smoke to a very large extent.

In this manner I provide fuel burning apparatus in which the firing is done automatically, and the coal distributed evenly and uniformly while the rotation of the grate constantly varies the point of discharge, and there is an even heating for practically the entire area of the grate, and a very hot fire is the result.

combination of a rotary circular grate, a

downwardly inclined deflector arranged to overhang an arc of the grate, a vertical chamber for containing the fuel, a spiral conveyer in said chamber whereby the fuel is delivered from said chamber onto said deflector.

3. In solid fuel burning apparatus, the combination of a rotary circular grate,

' means for rotating same, a deflector above and projecting over an arc of said grate having a downwardly inclined face, and means for delivering the fuel to said defiector.

In solid fuel burning apparatus, the combination of a rotary circular grate,

means for rotating same, a masonry structure adjacent thereto having a downwardly inclined face arranged to overhang an arc of the grate, a passage formed in said masonry for containing the fuel, and means for discharging the fuel from said passage onto said inclined face, whereby thecoal is fed to said grate.

5. In solid fuel burning apparatus, the combination of a rotary circular grate, a masonry structure adjacent thereto having a downwardly inclined deflector overhang ing an arc of the grate and terminatingat its lower end above the fire bed of said grate, a vertical passage formed in said ma In testimony whereof, I the said AN DREW LANZ have hereunto set my hand.

ANDREW LANZ.

Witnesses:

A. E. CLANGY, RoBT. D. TOTTEN. 

